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Creating Alpha Transitions for DVD Studio Pro 3Part 1: Transitions with assets The background matte
The creation of the background matte is the most laborious part of the process, though not a difficult one. I created mine in Adobe After Effects using my main asset movie as a reference.
In order to create the matte, I simply added a black solid layer and a white solid layer to my composition.
Then I hid the original asset movie I was using as a reference and rendered out the composition. Here's the result, which you can download to follow along.
One important thing about the mask you create: the black must be pure black, and the white must be pure white. Any grays or colors will be interpreted as partial transparency in the final effect.
Also note that it's OK to be sloppy when you create your mask. It doesn't have to conform precisely to the edges of the main asset movie because it will be composited beneath the asset movie in DVD Studio Pro.
Finally, also note the name of the background matte. It's called "Skater640-backgroundMatte.mov." It must be named exactly the same as your asset movie, followed by a hyphen, followed by "backgroundMatte." The ".mov" extension doesn't affect the final outcome.
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